ngrx简单状态减速机

angular和ngrx的新成员,遵循文档,

我把这个基本的例子修改为:,

行动

export const increment = createAction('[Counter Component] Increment');
export const decrement = createAction('[Counter Component] Decrement');
export const reset = createAction('[Counter Component] Reset');

减速器

export const initialState = {
  num: 0
};

const _counterReducer = createReducer(initialState,
  on(increment, state => ({ num: state.num + 1})),
  on(decrement, state => ({ num: state.num - 1})),
  on(reset, state => ({ num: 0 })),
);

模块

StoreModule.forRoot({ count: counterReducer })

组成部分

count$: Observable<IState>;

constructor(private store: Store<{ count: IState }>) {
    this.count$ = store.pipe(select('count'));
}

HTML格式

<p> count$.num | async </p>

export interface IState {
  num: number
}

好像我错过了一些小事。

斯塔克布利茨: https://stackblitz.com/edit/angular-72vhrz